<template>
  <view>
    <!-- 使用自定义的搜索组件 -->
    <view class="search-box">
      <my-search @click="gotoSearch"></my-search>
    </view>
    
    <!-- 顶部轮播图 -->
    <swiper :indicator-dots="true" 
    :autoplay="true"
    :interval="3000" 
    :duration="1000" 
    :circular="true">
      <!-- 循环渲染轮播图的 item 项 -->
      <swiper-item v-for="(item, i) in swiperList" :key="i">
        <navigator class="swiper-item" :url="`/subpkg/goods_detail/goods_detail?good_id=${item.goods_id}`">
          <!-- 动态绑定图片的 src 属性 -->
          <image :src="item.image_src"></image>
        </navigator>
      </swiper-item>
    </swiper>

    <!-- 分类导航区域 -->
    <view class="nav-list">
      <view class="nav-item"
       v-for="(item, i) in navList" :key="i"
        @click="navClickHandler(item)">
        <image class="nav-img" :src="item.image_src"></image>
      </view>
    </view>

    <!-- 楼层区域 -->
    <view class="floor-list">
      <!-- 楼层 item 项 -->
      <view class="floor-item" v-for="(item, i) in floorList" :key="i">
        <!-- 楼层标题 -->
        <image class="floor-title" :src="item.floor_title.image_src"></image>
        <!-- 楼层图片区域 -->
        <view class="floor-img-box" >
          <!-- 左侧大图片的盒子 -->
          <navigator class="left-img-box" :url="item.product_list[0].url">
            <image 
            :src="item.product_list[0].image_src" 
            :style="{width: item.product_list[0].image_width + 'rpx'}"
            mode="widthFix">
            </image>
          </navigator>
          <!-- 右侧 4 个小图片的盒子 -->
          <view class="right-img-box">
            <navigator class="right-img-item" 
            v-for="(item2, i2) in item.product_list" 
            :key="i2" 
            v-if="i2 !== 0"
            :url="item2.url">
              <image 
              :src="item2.image_src" mode="widthFix" 
              :style="{width: item2.image_width + 'rpx'}">
              </image>
            </navigator>
          </view>
        </view>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        swiperList: [], //轮播图数据
        navList: [], //分类
        floorList: [], //楼层
      };
    },
    onLoad() {
      this.getSwiperList()
      this.getNavList()
      this.getFloorList()
    },
    methods: {
      // 轮播图
      async getSwiperList() {
        const {
          data: res
        } = await uni.$http.get("/home/swiperdata")
        if (res.meta.status !== 200) {
          return uni.showToast({
            title: "数据请求失败",
            duration: 1500,
            icon: 'none'
          })
        }
        this.swiperList = res.message
      },

      //分类导航
      async getNavList() {
        const {
          data: res
        } = await uni.$http.get('/home/catitems')
        if (res.meta.status !== 200) return uni.$showMsg()
        this.navList = res.message
      },

      // 分类导航  nav-item 项被点击时候的事件处理函数
      navClickHandler(item) {
        if (item.name === '分类') {
          uni.switchTab({
            url: '/pages/cate/cate'
          })
        }
      },

      //楼层栏 
      async getFloorList() {
        const {
          data: res
        } = await uni.$http.get('/home/floordata')
        if (res.meta.status !== 200)
          return uni.$showMsg()
          // 通过双层 forEach 循环，处理 URL 地址
            res.message.forEach(floor => {
              floor.product_list.forEach(prod => {
                prod.url = '/subpkg/goods_list/goods_list?' + prod.navigator_url.split('?')[1]
                // prod.url = `/subpkg/goods_list?${prod.navigator_url.split('?')[1]}` // 模版字符串写法
              })
            })
        this.floorList = res.message
      },
      
      gotoSearch() {
        uni.navigateTo({
          url: '/subpkg/search/search'
        })
      }
    },
  }
</script>

<style lang="scss">
  //轮播图
  swiper {
    height: 330rpx;

    .swiper-item,
    image {
      width: 100%;
      height: 100%;
    }
  }

  // 分类
  .nav-list {
    display: flex;
    justify-content: space-around;
    margin: 15px 0;

    .nav-img {
      width: 128rpx;
      height: 140rpx;
    }
  }

  // 楼层图
  .floor-title {
    height: 60rpx;
    width: 100%;
    // display: flex;
  }
  .floor-img-box {
    display: flex;
    padding-left: 10rpx;
  }
  .right-img-box {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
  }
  
  //搜索框样式
  .search-box {
    // 设置定位效果为“吸顶”
    position: sticky;
    // 吸顶的“位置”
    top: 0;
    // 提高层级，防止被轮播图覆盖
    z-index: 999;
  }
</style>
